A DESCRIPTION OF THE REQUEST :
Add String.format() support to Throwable.

Something like this:

public Throwable(String message, Object... format);
public Throwable(Throwable cause, String message, Object... format);

I think the reasons are obvious but it keeps people from having to do:

new Throwable(String.format("this bad thing happened: %s", badThing));

I think this type of support should be added to *every* exception. I know that may be a large task but at least adding it to the more common user-thrown exceptions would be good (Exception, RuntimeException, etc...).

JUSTIFICATION :
Because doing this:

new Throwable(String.format("this bad thing happened: %s", badThing)); is dumb...